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Additive manufactured thermoplastic-aluminum nanocomposite hybrid rocket fuel grain and method of manufacturing same

机译：添加剂制造的热塑性铝纳米复合混合火箭燃料颗粒及其制造方法

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摘要

A hybrid rocket solid fuel grain having a cylindrical shape and defining a center port is additive manufactured from a compound of thermoplastic fuel and passivated nanocomposite aluminum additive. The fuel grain comprises a stack of fused layers, each formed as a plurality of fused abutting concentric circular beaded structures of different radii arrayed defining a center port. During operation, an oxidizer is introduced along the center port, with combustion occurring along the exposed port wall. Each circular beaded structure possesses geometry that increases the surface area available for combustion. As each layer ablates the next abutting layer, exhibiting a similar geometry is revealed, undergoes a gas phase change, and ablates. This process repeats and persists until oxidizer flow is terminated or the fuel grain material is exhausted. To safety achieve this construction, a fused deposition additive manufacturing apparatus, modified to shield the nanocomposite material from the atmosphere is used.

机译：由热塑性燃料和钝化的纳米复合铝添加剂的混合物制成的添加剂具有圆柱形形状并限定了中心孔的混合火箭固体燃料颗粒。燃料颗粒包括一堆熔融层，每个熔融层形成为多个不同半径的熔融邻接的同心圆珠状结构，排列成一个中心孔。在操作过程中，氧化剂沿着中心端口引入，燃烧沿着暴露的端口壁发生。每个圆形的珠状结构都具有增加燃烧可用表面积的几何形状。当每一层烧蚀下一个邻接层时，显示出相似的几何形状，经历气相变化并烧蚀。重复该过程并一直持续到氧化剂流终止或燃料颗粒材料耗尽为止。为了安全地实现该构造，使用经改进以使纳米复合材料与大气隔离的熔融沉积添加剂制造设备。

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公开/公告号US9822045B2

专利类型
公开/公告日2017-11-21

原文格式PDF
申请/专利权人 RONALD D JONES;
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申请/专利号US201615275423
发明设计人 RONALD D JONES;
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申请日2016-09-25
分类号B29C67;C06B21;B22F1/02;B22F1;B22F3/105;B22F5/10;B22F7;B22F9/04;B33Y10;B33Y70;B33Y80;C06B45/10;C06B45;C06B45/12;F02K9/10;F02K9/72;C06B45/14;C06D5;B29C64/106;B29K55/02;B29K105/16;B29K505/02;
国家 US
入库时间 2022-08-21 12:55:57

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